Penjelasan dengan langkah-langkah:
menentukan nilai x
PS = SR
5x + 3 = 28
5x = 28 - 3
5x = 25
x = 25/5
x = 5
menentukan nilai y
Kell = PS + SR + PQ + QR
140 = 28 + 28 + 7x + y + 7x + y
140 = 56 + 14x + 2y
140 = 56 + 14(5) + 2y
140 = 56 + 70 + 2y
140 = 126 + 2y
140 - 126 = 2y
14 = 2y
y = 14/2
y = 7
menentukan panjang PQ
PQ = 7x + y
= 7(5) + 7
= 35 + 7
= 42 cm
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Penjelasan dengan langkah-langkah:
menentukan nilai x
PS = SR
5x + 3 = 28
5x = 28 - 3
5x = 25
x = 25/5
x = 5
menentukan nilai y
Kell = PS + SR + PQ + QR
140 = 28 + 28 + 7x + y + 7x + y
140 = 56 + 14x + 2y
140 = 56 + 14(5) + 2y
140 = 56 + 70 + 2y
140 = 126 + 2y
140 - 126 = 2y
14 = 2y
y = 14/2
y = 7
menentukan panjang PQ
PQ = 7x + y
= 7(5) + 7
= 35 + 7
= 42 cm